Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2022 (vol. 70), issue 6
In Vitro Antimicrobial Activity of Phosphate-Based Zinc Nanoparticles
Daria Baholet, Sylvie Skalickova, Tomas Kopec, Pavel Horky
Acta Univ. Agric. Silvic. Mendelianae Brun. 2022, 70(6), 349-353 | DOI: 10.11118/actaun.2022.025 
In recent years, zinc nanoparticles have captivated an attention due to their antimicrobial properties. Moreover, the advantage of nanomaterials is an ability to modify their chemical composition and influence their antibacterial properties. In this study, zinc-phosphate nanoparticles (ZnNPs) were prepared via chemical route of synthesis. Their antibacterial activity was evaluated by monitoring a bacterial growth of model microorganisms: gram-negative (G-) E. coli, and gram-positive (G+) S. aureus as well as methicillin-resistant S. aureus (MRSA). Obtained results have shown, the ZnNPs are the most effective against G+...
Evaluation of Differently Processed Maggot (Musca domestica) Meal as a Replacement for Fishmeal in Broiler Diets
Opeyemi Olutayo Ajiboye, Sadiq Gbolagade Ademola, Kolapo Kabir Arasi, Muritala Daniel Shittu, Akinyinka Olu Akinwumi, Mary Eniola Togun
Acta Univ. Agric. Silvic. Mendelianae Brun. 2022, 70(6), 355-363 | DOI: 10.11118/actaun.2022.026
The high cost of imported fishmeal as animal protein source is one of the limiting factors in raising broiler chickens particularly in Nigeria. Maggots are housefly larvae that are rich in protein which could be used as alternative to fishmeal in broiler production. This study assessed differently processed Maggot Meal (MM) as replacement for fishmeal in broilers diet in a completely randomized design. A total of 144 day old Arbor Acre broilers were randomly divided into 4 treatments. Each treatment (of 36 birds) was replicated thrice of 12 birds per replicate. Maggots were produced using blood and wheat offal as substrates in ratio 4:1 using either...
Influence of Heat Stress on Milk Production in Fraternal Twins
Jiří Bezdíček, Andrea Nesvadbová, Luděk Stádník, František Louda
Acta Univ. Agric. Silvic. Mendelianae Brun. 2022, 70(6), 365-372 | DOI: 10.11118/actaun.2022.027
The aim of this study was the evaluation of heat stress in milk production in dairy cows (daily milk yield; milk production in 1st lactation). The comparison was performed between fraternal twins (full sisters), produced on the same farm and same parity. One of the twins produced in a hot period whereas her sister produced in a cooler period. Also, there can be differences in milk production between fraternal twins. Therefore, a second group of fraternal twins was also created that produced without heat stress. Databases of fraternal twins were analysed using PROC GLM analysis of Statistica® with selected effects. In conclusion,...
Characteristics of Lactation Curve and Reproduction in Dairy Cattle
Sergiy Ruban, Viktor Danshyn, Мykhailo Matvieiev, Oleksandr O. Borshch, Oleksandr V. Borshch, Lesia Korol-Bezpala
Acta Univ. Agric. Silvic. Mendelianae Brun. 2022, 70(6), 373-381 | DOI: 10.11118/actaun.2022.028
The purpose of the research was to assess changes in the lactation activity of cows and their impact on the level of reproduction, as well as to study their fluctuations with respect to genetic and environmental factors. A sample of 807 cows of various ages was formed for the study. The cows were kept on a commercial farm in Kharkiv region, Ukraine. Data from DairyPlan C21 software were used in the study. It was revealed that the parameters of the Wood lactation curve model were significantly influenced by the calving season, days open, and cow's origin; lactation persistency of cows was more influenced by environmental factors (parity, calving season,...
Contributions Burden on Persons Active in Agriculture in Relation to Pension Aspects
Helena Čalkovská, Lukáš Míča, Milena Otavová, Jana Gláserová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2022, 70(6), 383-395 | DOI: 10.11118/actaun.2022.029
The paper focuses on the area of the burden of contributions to state budget with an emphasis on pension insurance contributions of employees and self-employed persons active in the agricultural sector with regard to the amount of their future retirement pension. The comparison shows that self-employed workers in agriculture contribute to state budget about 2.5 times less than employees with comparable net income. As a result, the level of pensions is insufficient, predominantly for entrepreneurs whose pensions only amount to 39 to 45% of their real net income. On the basis of analysis of results from different models, calculations were made of the...
The Effect of Fish Production and Environmental Factors on Phytoplankton in Hypertrophic Fishponds
Marija Radojičić, Radovan Kopp, Barbora Müllerová, Michal Šorf
Acta Univ. Agric. Silvic. Mendelianae Brun. 2022, 70(6), 397-406 | DOI: 10.11118/actaun.2022.030
Fishponds form substantial part of standing water ecosystems in the landscape of the Central Europe. We studied the effects of fish production and environmental parameters on phytoplankton in fifteen fishponds of various size, fish production and situated at different altitudes. Water and plankton samples were collected from April to October 2018 and 2019. Phytoplankton abundance, zooplankton biovolume, total phosphorus, total nitrogen, ammonia-nitrogen, nitrites, nitrates, phosphates, and total iron concentration were determined. Based on average values of total nitrogen (8.53 mg.l-1), total phosphorus (0.399 mg.l-1),...